What is the Sandstone V50017-U4355-K500-ST?
The Sandstone V50017-U4355-K500-ST is a XFP optical transceiver module, listed by the manufacturer as "Infinera 10G CWDM XFP, 10GBASE-ER, OC192-IR2, STM64-S64.2b, 1550 nm, 40km SMF LC, DDM, C-Temp, YELLOW Latch". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.